I guess you're on Windows? Read more about docks.You can have something like tat on windows with XWindows Dock, OcjectDock, Rocket Dock or RK Launcher. Look at this deviantArt group, the best group for Docks [link]

i've been trying whole day to get new dock and noone works, i have candybar updated and i do everything, open with candybar, drag & drop.. everything.. and still cant understand how to get this dock theme to work